Combined cyclometer and speed-indicator.



No. 644,579. Patented Mar. 6, I900;

E. D. CLAPP.

COMBINED GYCLQMETEB AND SPEED INDICATOR.

(Apizlication filed May 17, 1899.)

(No Model.)

UNITED STATES PATENT OFFICE.

EDWARD D. OLAPP, OF WASHINGTON, DISTRICT OF COLUMBIA.

COMBINED CYCLOMETER AND SPEED-INDICATOR.

SPECIFICATION forming part of Letters Patent No. 644,579, dated March 6,1900.

Original application filed April 1, 1898, Serial No. 676,069- Dividedand this application filed May 17, 1899. Serial Nb, 717,210. on) model.)

To all whom, it may concern:

Be it known that I, EDWARD D. OLAPP, a citizen of the United States, anda resident of lVashington, in the District of Oolumbia,have inventedcertain new and useful Improvements in a Combined Cyclometer and Speed-Indicator, of which the following is a specification.

This invention is an improvement in a combined cyolometer andspeed-indicator for bicycles and other vehicles; and the object of thesame is to provide an instrument of this character which shall becompact in construction and positive in operation and in which provisionis made for readily and conveniently changing the relative gearing ofthe distance-measurer and time mechanism, all as hereinafter fullydescribed and specifically claimed.

This application is a division of original application filed April 1,1898, Serial No. 676,069.

In the accompanying drawings, which form a part of this specification,Figure 1 is a plan or face view of the combined cyclometer andspeed-indicator. Fig. 2 is a side view, partly in section.

In carrying out my invention I employ as an essential part thereof awatch or chronometer of any approved make and extend theupper part ofthe casing A to adapt the same to receive the mechanism hereinafterdescribed in addition to the time mechanism of the watch. The extendedportion of the casing is provided interiorly with an annular shoulder a,located a suitable distance above the face of the watch, and exteriorlysaid extended portion has formed at one side thereof a tube a, inclosinga worm-shaft that meshes with the peripheral teeth of a pair of annularplates or gear-rings B and B, mounted upon the shoulder a, the lowerring being wider than the other and provided with graduations, as shown,to indicate the distance in miles. These gear-rings or annular platesform the cyclometer or distance-measurer, and to this end the lowerring, which has the graduations, is provided with a less number of teeththan the other ring, and the gearing between the worm-shaft and wheel ofthe vehicle is so proportioned that each revolution of the uppergear-ring or plate will represent a certain fraction of a mile, and anumber of revolutions will represent a mile, registered by thegraduations on the lower ring in conjunction with the pointerb, carriedby the upper ring, said pointer also cooperating with the time mechanismhereinafter described for indicating when the vehicle is attaining apredetermined rate of speed.

The cyclometer or speed-measurer just described issimilar to that shownin my said original application in which the pointer of said distancemeasurer and recorder cooperated with a second pointer driven from thewatch-movement to indicate a certain speed when both pointers moved inunison, the relative gearing being changed by interchangeablegear-wheels by which the movement of the time mechanism of the watch wastransmitted to said second pointer.

By this application I contemplate a means of changing the relativegearings of the distance-measurer and time mechanism, which consists inattaching a bevel-pinion O to the extended arbor of the seconds-hand ofthe watch-movement, loosely mounting a differential gear-wheel D on theextended arbor or shaft at the center of the watch, and gearing the twoby a fixed pinion and a movable pinion, as hereinafter particularlydescribed. To this. end a shaft E is mounted above the difierentialgear-wheel and pinion and carries a fixed pinion F, in mesh wit-l1 theaforesaid pinion O, and a pinion F, movable upon the said shaft to meshwith any one of the series of gear-teeth on the differential gearwheelD. feather e on the shaft and has a grooved collar f at one side, withwhich engages a yoke G, formed on the end of a shifting lever G,

the latter being pivoted to the watch-casing,

as shown, and extends beyond the same to be conveniently operated. Thislever can frictionally engage its bearings sufficiently to hold it in anadjusted position, though it is obvious that any other means could beemployed for the purpose. It is also apparent that provision could bemade for further increasing and diminishing the timegearing between thepinion O and gear-wheel D by having the pinion F movable the same aspinion F and mounting a differential gear- The pinion F engages a splineor wheel in place of the pinion G, in other words, by merelyduplicatingthe gearing between the shaft and gear-wheel D and substituting same forthe gearing between said shaft and arbor of the seconds-hand of thewatch. The differential gear-wheel D carries a hand or pointer d, whichcooperates with the pointer b of the distance measurer and recorder toindicate -the speed at which the vehicle may be traveling. It will beunderstood, of course, that the gearing of the pointer or hand at withthe time mechanism of the watch is so proportioned with respect to thegearing of the pointer b with the wheel of the vehicle that bothpointers will move in unison when a predetermined speed is attained bysaid vehicle, and the changeable gearing mechanism hereinbeforedescribed provides for changing the relative time-movement of thepointer d to have it go either slow or fast. It is obvious, therefore,that when the pointer d is so geared to the time-movement or mechanismthat the pinion F is in mesh with the inner series of gear-teeth on thewheel D the synchronous movement of the pointers d and Z) will indicatethat the vehicle is attaining, a certain speed.for instance, a mile intwo minutes and ten secondswhile the gearing of said pinion with theouter series of gear-teeth on wheel D would indicate a much slowerspeed. In practice it is intended, therefore, that each series ofgear-teeth on the gear-wheel D shall represent a certain speed-gear inconjunction with the movable pinion, by which the timemovement istransmitted to said gear-wheel. This peculiar manner of changing therelative gearings of the distance-measurer and time mechanism byregulating the time-movement of the pointer 61 permits the changeablegearing to be located above the face of a watch and in connection withthe simple form of distance-measurer forms a very compact device whichis but very little larger than an ordinary watch.

By employing the differential gear-wheel and movable pinion the tiInc-movement of the pointer 01 can be regulated to indicate differentspeeds, and as said movable pinion is operated by the lever, whichextends beyond the watch-casing, the speed-indicatin g mechanism can bereadily and conveniently changed. This will be found very convenient,more especially when the device is used upon a bicycle to indicate anydeviations in the speed of the same from the time designed to be madebyit, for the designated time can be changed while the rider ispropelling his bicycle and without removing the device from its support.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a combined cyclometer and speed-indicator, the combination with awatch, of distance-measuring mechanism operating a pointer above theface of the watch, a gearwheel driven by the watch-movement, a secondgear-wheel carrying a pointer, one of the gear-wheels being adifferential gear-wheel, and means for gearing said gear-wheels one tothe other, substantially as shown and for the purpose set forth.

2. In a'combined cyeloineter and speed-indicator, the combination withthe watch, of distance-measuring mechanism operating a pointer above theface of the watch, a gearwheel driven from the watch-movement, a secondgear-wheel carrying a pointer adapted to move in unis-en with theaforesaid pointer, one of the gear-wheels being a differentialgear-wheel, a shaft, and pinions mounted on the shaft to mesh with thegear-wheels, substantially as shown and for the purpose set forth. a

In a combined cyclometer and speed-indicator, the combination with awatch, of distance-measuring mechanism operating a pointer above theface of the watch, a gearwheel driven by the watch-movement, a secondgear-wheel carrying a pointer adapted to move in unison with theaforesaid pointer; one of the gear-wheels being a differentialgear-wheel; a shaft; pinions on the shaft to mesh with the aforesaidgear-wheels, one of the pinions being movable upon the shaft, and meansfor moving said pinion, substantially as shown and for the purpose setforth.

at. In a combined cyclometer and speed-indicator, the combination,of awatch, distance measuring mechanism operating a pointer above the faceof the watch, a gear-wheel driven by the watch-movement,a secondgearwheel carrying a pointer adapted to move in unison with theaforesaid pointer; one of the gear-wheels being a differentialgear-wheel; pinions mounted on a shaft to mesh with the gear-wheels, oneof the pinions being movable; and an operating-lever connected to themovable pinion, substantially as shown and for the purpose set forth.

5. In a combined cyclometer and speed-indicator,the combination, of awatch,distancemeasuring mechanism operating a pointer above the face ofthe watch, a gear-Wheel driven by the watch-movement,a second gear-Wheel carrying a pointer adapted to move in unison with the aforesaidpointer, one of the gear-wheels being a differential gear-wheel; pinionsmounted on a shaft to mesh with the gear-wheels, one of the pinionsbeing movable and provided with a grooved collar; and a lever having ayoke engaging the grooved collar, the end of the lever projecting beyondthe watch-casing, substantially as shown and for the purpose set forth.

(3. In a combined cyclometer and speed-indicator, the combination, of awatch having a casing extended above the face of the watch; differentialgear-rings mounted in said extension and having graduations and apointer, respectively; a gear-wheel driven by the watch-movement; asecond gear-wheel mounted above the face of the watch and carrying apointer adapted to move in unison with the aforesaid pointer; andchangeable gearing together with changeable gearing between 10 betweensaid gear-wheels, substantially as the aforesaid gear-Wheels,substantially as shown and for the purpose set forth. shown and for thepurpose set forth.

7. In a combined cyclonieter and speed-in- In testimony whereof I affixmy signature dicator, the co1nbination,of awatch, distancein thepresence of two witnesses. measuring mechanism operating a pointerEDWARD D. CLAPP. above the faceof the watch, a gear-Wheel Witnesses:driven by the watch-niovement,a second gear- FRANK D. BLAOKISTONE,

wheel, and a pointer operated by the latter; H. L. BEALL.

